package cn.wolfcode.wolf2w.service.impl;

import cn.wolfcode.wolf2w.domain.Strategy;
import cn.wolfcode.wolf2w.domain.StrategyCatalog;
import cn.wolfcode.wolf2w.query.StrategyCatalogQuery;
import cn.wolfcode.wolf2w.repository.StrategyCatalogRepository;
import cn.wolfcode.wolf2w.service.IStrategyCatalogService;
import cn.wolfcode.wolf2w.service.IStrategyService;
import cn.wolfcode.wolf2w.util.DBHelper;
import cn.wolfcode.wolf2w.vo.CatalogVO;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.aggregation.Aggregation;
import org.springframework.data.mongodb.core.aggregation.AggregationResults;
import org.springframework.data.mongodb.core.aggregation.TypedAggregation;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;


@Service
//@Transactional mongodb事务必须复制集方式
public class StrategyCatalogServiceImpl implements IStrategyCatalogService{

    @Autowired
    private StrategyCatalogRepository repository;

    @Autowired
    private MongoTemplate template;

    @Autowired
    private IStrategyService strategyService;


    @Override
    public void save(StrategyCatalog strategyCatalog) {
        strategyCatalog.setId(null);
        repository.save(strategyCatalog);
    }

    @Override
    public void update(StrategyCatalog strategyCatalog) {
        repository.save(strategyCatalog);
    }

    @Override
    public void delete(String id) {
        repository.deleteById(id);
    }

    @Override
    public StrategyCatalog get(String id) {
        return repository.findById(id).orElse(null);
    }

    @Override
    public List<StrategyCatalog> list() {
        return repository.findAll();
    }

    @Override
    public Page<StrategyCatalog> query(StrategyCatalogQuery qo) {
        /* public static PageRequest of(int page, int size, Direction direction, String... properties) {
        return of(page, size, Sort.by(direction, properties));
    }*/
        Query query=new Query();
        Pageable pageable=PageRequest.of(qo.getCurrentPage() - 1, qo.getPageSize(), Sort.Direction.ASC, "_id");
        return DBHelper.query(template, StrategyCatalog.class, query, pageable);
    }

    @Override
    public void saveOrUpdate(StrategyCatalog strategyCatalog) {

        if (StringUtils.hasLength(strategyCatalog.getId())) {
            //update
            //所以这种等价于全量更新
            this.update(strategyCatalog);
        } else {
            //save
            this.save(strategyCatalog);
        }
    }

    @Override
    public List<CatalogVO> groupList() {
        List<CatalogVO> list=new ArrayList<>();
        //聚合查询
        TypedAggregation<StrategyCatalog> agg=Aggregation.newAggregation(StrategyCatalog.class, Aggregation.group("destName").
                push("name").as("names").
                push("id").as("ids"));
        AggregationResults<Map> result=template.aggregate(agg, Map.class);
        List<Map> datas=result.getMappedResults(); //将结果转化成list<map>   map描述一行数据


        for (Map data : datas) {
            CatalogVO vo=new CatalogVO();

            vo.setDestName(data.get("_id").toString());  //id
            List<Object> names=(List<Object>) data.get("names");  //攻略分类的名称集合
            List<Object> ids=(List<Object>) data.get("ids");  //攻略分类的ids集合

            List<StrategyCatalog> catalogList=new ArrayList<>(); //攻略分类对象

            for (int i=0; i < names.size(); i++) {
                StrategyCatalog sc=new StrategyCatalog();
                String name=names.get(i).toString();
                String id=ids.get(i).toString();
                sc.setId(id);
                sc.setName(name);
                catalogList.add(sc);
            }
            vo.setCatalogList(catalogList);
            list.add(vo);
        }
        return list;
    }

    @Override
    public List<StrategyCatalog> queryCatalogByDestId(String destId) {
        //1:所有指定destId的所有分类(通过目的地id查询)
        List<StrategyCatalog> list = repository.findByDestId(destId);
        //2:遍历分类, 查询分类下所有攻略
        for (StrategyCatalog strategyCatalog : list) {
            List<Strategy> sts = strategyService.queryCatalogId(strategyCatalog.getId());
            strategyCatalog.setStrategies(sts);
        }
        return list;
    }

}
